Fire crews attended the blaze which took nearly two hours to get under control.

But despite extensive damage being caused to the building, bosses say that they are “cautiously optimistic” Surf Snowdonia will still open in July or August,

A spokeswoman for Surf Snowdonia said: “We should be able to open in July or August.

“I think we’d say ‘cautiously optimistic’.”

Surf Snowdonia operations director Andy Ainscough said last week: “We are already getting bookings from as far away as California and Australia, the president of the International Surfing Association Fernando Aguerre is calling us on a monthly basis Surf Snowdonia is at present the talk of the surfing world.”